Ensuring you'll be able to change the amount of your memorized transactions is my priority, @zy2. Let me share some info on how you can perform the task. 

In QuickBooks Desktop (QBDT), you'll have to manually change the amount of a memorized transaction. Modifying the information as a group is unavailable. I'll guide you on how:

1. In QBDT, go to the Lists menu.
2. Next, choose Memorized Transactions List.
3. From there, look for the group where the transactions are assigned.
4. Double-click the transaction to open.
5. Once opened, change the amount of the entry and select Memorized button.
6. Then, choose Replace to confirm the changes and avoid double entry.

For reference, feel free to check this article: Create, edit, or delete memorized transactions.

That's it you'll now be able to change the amount of your memorized transaction.

If you have additional questions about the process above, don't hesitate to post a reply below. I appreciate any updates about this. Have a good one.